Using a chapter cover not from the comic

I was curious about this, so I did a few tests.
You could do a few different tricks to hack this problem.

1. Upload a portrait image with the landscape cover (top for best placement).
Pros:
Your cover is landscape. Cons:
The cover is smaller than the rest of the chapter. There's a huge space below with missing content (see image: https://i.imgur.com/fpWsm8Z.png)
2. Split your cover into two sides and uncheck "Force Single Page Cover"
Pros:
You'll have your landscape cover; no awkward spacing - https://i.imgur.com/2KaLGpX.pngCons:
Readers can access the left or right side individually - https://i.imgur.com/PKGAove.pngBut as you can see, I put the full landscape cover in as a page.
It's not ideal and something that Globalcomix should look into fixing but that's what I found in the last 20 mins. Hope this helps in some way.

Best of luck!

Thank you @SketchHarris for taking the time to study the case.

I had considered solution 1 but abandoned it because of the blank space.

I am almost able to use solution 2 right away as the first page of the first chapter starts with a vertical panel. I will experiment with splitting the page after it (not two equal halves though).

There's a third solution which I thought would work, selecting that vertical panel directly from the first page set as a cover, but I discovered that the "Set as cover" function sets the cover of the series, not the chapter.

Thank you again!

If you click on the cover image itself on your comics landing page you can upload a new cover or your series that way. We currently don't have a feature that allows for custom covers on individual releases.

It looks like you were able to find a middle ground and have a cover for your series. Is there anything else I could help with or clarify for you?

Thank you for the clarification, @ArtCrumbs. I had initially set the series cover that way, in the series settings. uploading a portrait image based on the first panel in the first chapter because, believe it or not, I haven't made any actual cover image in landscape format yet.

Then when experimenting with the Set Cover button on the pages hoping to set a chapter cover, I accidentally overwrote the series cover with almost the same image.

I did some testing for a chapter cover image by splitting the first page in two but am not happy with the result. My layout is really intended to fill in landscape screens with no scrolling. I have left the chapter cover to automatic in spite of the conflict in the orientation.

@Leo I see, thank you for following up with me about this. Have you considered making a unique chapter cover to put at the front of your release? That appears to be what most people do. You can set that image to be alone (forced single page), so that it won't interfere with the interior pages you already have uploaded.

@ArtCrumbs This is what I did initially but I don't like the jump it creates from portrait to landscape. My pages being wide landscape can be considered to be all double page spreads and I don't think anybody would try to display two of them side by side. But I'm ok now with not having a portrait cover, it looks like it is mostly the series cover that is displayed here and there. Thanks for the help.

@Leo The way double page spread display works, it shouldn't cause an issue. The reader will only see two pages at a time if the reader's screen is wide enough to support it, if they have the setting turned on at all. So I wouldn't worry too much about that.

If you have any other questions, feel free to let me know.